FACTBOX: Possible cabinet choices for Obama

(Reuters) - U.S. President-elect Barack Obama is expected to move quickly to announce members of his Cabinet to start tackling the economic crisis as well as other pressing issues including the wars in Iraq and Afghanistan.

Obama has announced that Illinois congressman and fellow Chicagoan Rahm Emanuel will head his White House staff, and said at his first news conference on Friday that he expects to make other announcements within weeks.

Here are some of the possible choices for key Cabinet positions.

SECRETARY OF DEFENSE

- Defense Secretary Robert Gates was sworn in by outgoing President George W. Bush on December 18, 2006. Obama voted to confirm him. Gates served as CIA director from 1991 until 1993.

- Richard Danzig is a close adviser to Obama. He served as Navy secretary under President Bill Clinton. He also served as Navy undersecretary from 1993 to 1997.

TREASURY SECRETARY

- Lawrence Summers served as Treasury secretary under Clinton. The former president of Harvard University has been a top adviser to Obama.

- Timothy Geithner is president of the New York Federal Reserve Bank. He served as Treasury undersecretary for international affairs during the Clinton administration.

SECRETARY OF STATE

- Sen. John Kerry of Massachusetts was the Democratic candidate in the 2004 presidential election. A Vietnam War veteran, he was first elected to the U.S. Senate in 1984.

- Sam Nunn is a former senator from Georgia who chaired the Senate Armed Services Committee. Nunn has long been viewed as a leading Democratic voice on foreign policy.

- Sen. Chuck Hagel of Nebraska, an outspoken member of the Committee on Foreign Relations, has been a leading Republican critic of the Bush administration's Iraq invasion. He is retiring from the Senate, having served two terms.

DIRECTOR OF THE OFFICE OF MANAGEMENT AND BUDGET

- Peter Orszag has headed the nonpartisan Congressional Budget Office since January 2007. He previously served as an economic adviser to President Clinton.

U.S. TRADE REPRESENTATIVE